sanitizer_common: fix 32-bit build
https://reviews.llvm.org/D105716 enabled thread safety annotations,
and that broke 32-bit build:
https://green.lab.llvm.org/green/job/lldb-cmake/33604/consoleFull#-
77815080549ba4694-19c4-4d7e-bec5-
911270d8a58c
1. Enable thread-safety analysis in unit tests
(this catches the breakage even in 64-bit mode).
2. Add NO_THREAD_SAFETY_ANALYSIS to sanitizer_allocator_primary32.h
to unbreak the build.
Reviewed By: melver
Differential Revision: https://reviews.llvm.org/D105808